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Juliette [100K]
3 years ago
7

How many terms does the expression have? -7+4-3x+8x−7+4−3x+8x

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
8 0

Answer:

2 I think

Step-by-step explanation:

first, simplify it

-7+4-3x+8x-7+4-3x+8x

-6+10x

2 terms

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How do you factor 2x^2-9x-5?
maks197457 [2]

Hello from MrBillDoesMath!

Answer:  (2x + 1) (x-5)

Discussion:

To factor the polynomial let's find its roots using the quadratic formula:


x = ( -b -+\- sqrt ( b^2 - 4ac)) / 2a which in our case is:


x =    ( - (-9) +\- sqrt ( (-9^2 - 4*2*(-5)) )   /(2*2)

x =  ( 9 +\-  sqrt (81 + 40))/4 =>

x = ( 9  +\- sqrt(121))  / 4 =>

x = ( 9 +\- 11) /4 as sqrt (121) =11

Finally then,

x = ( 9 - 11) /4  = -2/4 = -1/2 and

x = (9 + 11)/4 = 20/4 = 5

So the polynomial factors as follows:

( 2x - (-1) ) ( x - 5) or

(2x + 1) (x-5)



Thank you,

MrB

7 0
3 years ago
¿Cuál dígito debe ir en el recuadro para
Keith_Richards [23]

Answer:

7

Step-by-step explanation:

English:

Which digit should go in the box to

make the next number divisible

between 2, 3 and 9? 8 ,? 48

Let x be the number, then the number will look like this:

8x48

This number is already divisible by 2, because it ends with an even number.

Now we need to check for divsibility by 3.

For this to be divisible by 3, the sum of the digit should be a multiple of 3.

8 + x + 4 + 8 = x +20

We know if a number is divsible by 9, it is also divsible by 3.

So

x + 20=9,18,27,....

The least positive solution is

x + 20 = 27

x = 27 - 20

x = 7

Therefore 8748 is divsible by 2,3, and 9.

4 0
3 years ago
PLEASEEEE HELPPP ITS DUE IN 15 MINUTES!! the exponential regression representing the population of Lazy Town as a function of ti
Advocard [28]

Given:

R^2=0.92,a=8000,b=0.9.

Exponential regression model is

y_1\sim a(b)^{x_1}

To find:

The exponential regression representing the population of Lazy Town as a function of time in years.

Solution:

Exponential regression model is

y_1\sim a(b)^{x_1}       ...(i)

We have, a=8000,b=0.9.

Substituting a=8000 and b=0.9 in (i), we get.

y_1\sim 8000(0.9)^{x_1}

Therefore, the exponential regression representing the population of Lazy Town as a function of time in years, is y_1\sim 8000(0.9)^{x_1}.

4 0
3 years ago
What is2.43 in fraction or mixed number
Vladimir79 [104]
2.43
as a mixed number: 2 43/100
as an improper fraction: 243/100

Hope this helps!! :D
4 0
4 years ago
Read 2 more answers
At the beginning of an experiment, there are 400 grams of contaminants. Each hour, three-fourths of the contaminants are filtere
WITCHER [35]
<span>a(n) = 0.75*a(n-1)
</span><span>Ans: 400 ; (3/4)400 = 300 ; (3/4)300 = 900/4 ; (3/4)900/4 = 2700/16 = 168.75g's</span>
7 0
3 years ago
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